Title: Process for preparation of dense soda ash
Application Number: 85108727 Application Date: 1985.12.02
Publication Number: 1011473 Publication Date: 1987.06.10
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C01D7/12
Applicant(s) Name: AKZO N.V. (NL) 6824 BM Arnhem, the Netherlands Address:
Inventor(s) Name: Gerrit Van Den Berg
Attorney & Agent: XU RUXUN LIU MENGMEI
Abstract:
     A process for producing dense soda ash consists of hot decomposition of the sodium bicarbonate existing in the sodium carbonate slurry at a decomposition temperature of over 135 deg.C, and separation of anhydrous sodium carbonate from the mother liquor. To prevent scaling of the heating walls of the vessel, the hydrostatic head in the vessel should be kept over a minimum value. At the decomposition temp. of 150 deg.C or over the hydrostatic head should preferably be at least 10 metres.
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